uid=SEV,o=LTER,dc=ecoinformatics,dc=orgallpublicreadBurn Exclosure Rodent Population Study at the Sevilleta National Wildlife Refuge, New Mexico (1991-1993)RobertParmenterValles Caldera National PreserveP.O. Box 359, 090 Villa Louis MartinJemez SpringsNM87025USbparmenter@vallescaldera.govInformation ManagerSevilleta LTER1 University of New MexicoAlbuquerque87131US(505) 277-2109(505) 277.5355data-use@sevilleta.unm.eduJamesBruntUSdata manager2011-02-18EnglishSmall mammal densities were estimated from small mammal recapture data in burned and unburned grassland.populationsCore Areaspopulationsreproductionburningtrappingsmall mammalsLTER Controlled VocabularyData PoliciesThis dataset is released to the public and may be freely downloaded. Please keep the designated contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement of the Sevilleta LTER. A copy of any publications using these data must be supplied to the Sevilleta LTER Information Manager.http://sev.lternet.edu/data/sev-15The BurnX study area is located on the southern end of Mckenzie Flats.-106.676-106.67634.307334.307316351635meter1991-09-011993-09-01File created by Susan McKelvey 3/29/93. File supplemented by Rosemary Vigil 24 June 1993. Checked Oct 20, 1995; James BruntInformation ManagerSevilleta LTER1 University of New MexicoAlbuquerque87131US(505) 277-2109(505) 277.5355data-use@sevilleta.unm.eduInformation ManagerSevilleta LTER1 University of New MexicoAlbuquerque87131US(505) 277-2109(505) 277.5355data-use@sevilleta.unm.eduSevilleta LTERWeb trapping design: Experimental units were established in a 4 x 4 grid as part of a burn and antelope exclosure experiment. Small mammals were trapped in fireblocks 1, 2, 3, and 4. Each fireblock contains four webs, for a total of 16 webs. Small mammal densities are estimated from recapture data.Within each location four webs were established. Each web contains twelve 100m transects radiating from a central point in a spoke like fashion. Four "Sherman" traps were placed around this central point. Twelve traps are placed along each of the radiating lines, the first four are placed at 5m intervals, and the remaining eight placed at 10m intervals. Rebar were used to mark the location of trap placement. Each rebar was tagged with a number from 1 to 145, with trap number 1 at the north facing spoke and radiating out to trap number 12, with each spoke following with successive numbers increasing in a clockwise fashion. Trap number 145 includes the four traps placed in the center of the web. Traps were placed adjacent to rebar unless a shaded area could be found within a meter or so along an arc of equal radius from the center. The webs are separated by distances from approx. 100m to 600m. Within each fireblock, each web is marked with a number from 1-4.Trapping times:Each summer was divided into two periods: period 1 and period 2.Mammals were trapped as follows:1991: period 1: NAÂ Â Â Â Â Â Â Â period 2: September 4 - October 41992: period 1: April 15 - May 8Â Â Â Â Â Â Â Â period 2: August 4 - September 171993: period 1: April 6 - 29Â Â Â Â Â Â Â Â period 2: September ??Each location was trapped in the same order for each period.The order is as follows:1. Fireblock 12. Fireblock 23. Fireblock 34. Fireblock 4Each trapping session consisted of placing and baiting traps on Monday, then checking the traps at dawn on both Tuesday (night 1), Wednesday (night 2), and Thursday (night 3). The traps were collected on Thursday after being checked for animals. A small handful of rolled oats was placed into each trap, with small amounts placed outside trap door. Animals were removed form closed traps with the aid of plastic bags. They were then identified to species. Weight was determined to the nearest gram using a pesola scale. Body, tail, foot, and ear measurements were taken for Peromyscus. Body and tail measurements were taken for Onychomys, Perognathus, and Reithrodomtomys. All measurments were taken to the nearest millimeter using a plastic ruler. Reproductive status was determined by examination of the genitalia. The animal was also sexed, aged, and marked. Marking was done to each animal on the first nights capture for each individual animal.Data Entry1. Data were entered at Biology Annex using data entry program "mammal-entry"2. Data were checked for errors by comparing original data sheets with the data entered into the computer.3. After all errors were corrected, a dbf file was created using a Sun machine. (/research/local/mammal/bin/SASmam2dbf filename &gt; filename.dbf) This modifies the comments, leaving out comments noted as "na".4. A rdb file was then created using "arc2rdb filename.dbf &gt; filename.rdb".5. The rdb file was then checked for errors using "check &lt; filename.rdb".6. After errors were corrected, the rdb file was sorted using "sort filename | uniq -c | page" to check that every entry was unique.7. Duplications were investigated and corrected.8. Dbf and rdb files were then copied to /research/archive/dbwork/vertebrate/ mammal/burnplot9. From sevilleta, at burnplot&gt;, the rdb file was run through a program called webDist to create an input file as such: " webDist filename.rdb location period &gt; conventional input name. (naming conventions: site-season-year.in)10.Input file was copied into /research/archive/dbwork/vertebrate/mammal/ burnplot11.From a PC, the input file was run through a distance program in order to get densities. (from dos: L:, cd distance, dist i=L:\burnplot/filename.in o=L:\burnplot\filename.out)12.Densities were cbtained from the output file and put into /mammal/data/ density-data/mammal_densities.data.burn which is a table containing the following: year season location web n density stderr cv lcl ucl. 13.At this point, nothing further has been done.sev015_burnxrodentpop_10191995.txtData for BurnX Rodent Population Studysev015_burnxrodentpop_10191995.txt558631\ncolumn,"http://sev.lternet.edu/sites/default/files/data/sev-015/sev015_burnxrodentpop_10191995.txt1991-01-011993-01-01yearyearThe year in which data was collected.dateYYYYlocationlocationOne of the four sites where the webs are located: fireblk1, fireblk2, fireblk3, fireblk4stringOne of the four sites where the webs are located: fireblk1, fireblk2, fireblk3, fireblk4periodperiodThe time of year trapping was donestring1spring2fallhabitathabitatType of habitatstringType of habitatrecaprecapAn indication if the animal was a recapture or notstringya recapture from that week onlynnot a recapturenightnightThe night that the trapping was donestringThe night that the trapping was donewebwebThe number of the web being sampled, which can range from 1-5 depending on site and project.stringThe number of the web being sampled, which can range from 1-5 depending on site and project.traptrapThe numbered tag on rebar adjacent to the trapstringThe numbered tag on rebar adjacent to the trapSpecies codespecies_codeThe four letter code used to identify species. The first two letters represent the first two letters of the genus and the second two letters represent the first two letters of the species.stringThe four letter code used to identify species. The first two letters represent the first two letters of the genus and the second two letters represent the first two letters of the species.id#id#The number given to each indiviual animalstringThe number given to each indiviual animaltagtagThe type of tag number that was on the animalstringtctoeclip; from a pool of numbers for each genuseteartag; from one set of numbers, used sequentiallynknunc tube number; from nk number booknamissingsexsexGender of animal (M or F)stringGender of animal (M or F)ageageEstimated from animal's weight.stringaadultjjuvenilenamissingmassmassWeight determined to nearest gram using a pesola scalegram0.1realnamissingreproductionreproductionThe reproductive status of the animalstringstscrotal testesppregnantllactatingvvaginal bleedingnamissingbodybodyLength from the tip of the snout to the distal portion of the pelvismillimeters1realnamissingtailtailThe length from the distal portion of the pelvis to the last vertebra of the tailmillimeters1realnamissingfootfootThe length from the proximal bulb of the tarsus to the tip of the tailmillimeters1realnamissingearearThe length from the base of the tragus to the tip of the earmillimeters1realnamissingcommentscommentsA special statement related to an observation.stringnanot applicablemillimeter